Indirect detection experiments such as the Fermi Large Area Telescope (LAT) [1]}, AMS [2]} or IceCube [3]} provide one the possible ways to detect WIMPs. Theoretically, WIMPs undergo either annihilation [4]}, [5]}, co-annihilations [6]}, or decays [7]}, [8]} into a set of SM stable final state particles such as high energy photons, positrons, neutrinos, or anti-protons. Recently, an excess on the gamma-ray spectra was detected by the Fermi-LAT [9]}, called the Galactic Center Excess (GCE) which apparently seem to be consistent with predictions from DM annihilation (see e.g. [10]}). On the other hand, several attempts were made to address the GCE within particle physics models, in particular within supersymmmetric models [11]}, [12]}, [13]}, [14]}. An important finding is that the quality of the fits depend crucially on the theoretical precision on the determination of the gamma-ray spectra [11]}.
